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Explain how the concept of central tendency helps the psychologist achieve their goal. In your response, describe what the resulting value will tell the researcher about the typical crawling age and the clustering of the infant data.
Case context: A developmental psychologist is studying the age at which infants first crawl. After collecting data from 50 infants, they plot the distribution of ages. The researcher wants to summarize this distribution to find a single representative score that reflects the middle or typical crawling age rather than listing all 50 individual data points.
Question: Explain how the concept of central tendency helps the psychologist achieve their goal. In your response, describe what the resulting value will tell the researcher about the typical crawling age and the clustering of the infant data.
Sample answer: By identifying the central tendency, the psychologist can precisely describe the typical or middle crawling age in the distribution. This statistical characteristic provides a single score representing the center, showing the point around which the infants' ages tend to cluster.
Key points:
- Provides a single score representing the middle or typical value of crawling ages.
- Aids in precisely describing a key characteristic of the data distribution.
- Identifies the point around which the infants' scores cluster.
Rubric: Grading Rubric: - 4 points: Explanation demonstrates how central tendency summarizes the typical crawling age. - 4 points: Describes that central tendency points to where the ages cluster. - 2 points: Clarifies that this provides a precise description of the middle value.
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Research Methods in Psychology - 4th American Edition @ KPU
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